peters



J'NOMIAING, OF .BORDENTOVNg NEVERSEY.

Vivnaonrimfronv MAKING .i-uaznshrf LEA-D 'ia-ND .oTHERfsorzr METALS.

Speeication ofl'L'ettersPatent :Nm-35023, sdated March e30, `1843.

` 170 all whom t may concern.' i

Be it knoWnthat I; JOHN LAING,Yof=Bor dentown, in 2the' county lof iBurli-ngton and State `of :New/J ersey,`-1h`ave invented anew 5 and useful Improvement in theManner of Constructing aiNIachine or Apparatus for the Casting of Pipes of- Lead, landother'Soft Metals; and I do'hereby declare that'the following isa full1 and exact fdescriptionthereof. l0 Infmy apparatus for-casting pipe, the lead is to'be melted in as'uitable pot, fromthe lower part of which an ironltube proceeds in a horizontal direction, the finternal :diameter of whichftube is to'be'thesame withthat of ythe externaldiameter of thepipe to-rbe cast; and within this tube', there is -to be a core of iron, of thediameter which is1 -to be given tothe boreof the pipe. On the outer end of the first named iron tube,`-2there is to be a hollow nozzle fitted,'throiigh"wvhich cold water is to be made to run`,'1for the purpose of coolingthe pipe as it leaves the tube.

So far, my apparatus resembles such as has been previously essayed for the same purpose, but it has been found impossible, heretofore, to prevent the adhesion of the lead, or other soft metal,'to the core, said core becoming tinned, or coated with the metal, from which the pipe is cast; in consequence whereof, the pipe adheres firmly to the core, and the process is arrested.

My principal improvement consists in the adoption of a plan by which the adhesion of the pipe to the core is effectually prevented,

andl the pipe can, consequently, be cast interruptedly, and of any length that may be desired. To effect this, I give to the core, while the pipe is being cast, a continuous, vibratory motion around its axis, by which the adhesion of the pipe to it is prevented entirely. I have also improved the manner of forming the melting pot, and of combining it with the furnace, or fire chamber, which is to contain the fuel.

In the accompanying drawing, Figure 1,

is a perspective representation of the apparatus, or machine, and Fig. 2, a vertical section of it through the middle, from front to back. y

A, A', is the melting pot, whichI make of cast-iron; and I prefer to make it conical, in the upper part, as shown at A, with a cylindrical elongation at the lower part, as shown at A; by this construction, I can obtain all the height that I desire in the melted column ofl metal, without unnecessarily increasing l itsfq-uantity, and Iy thus render its vpressure 5 suflicien't to A'force ou't the pipe this construe 1 tion, lafs-combined with therire chambers,` also affordsC an opportunity 'of applying the Ifire in a very-economical and/convenient manner.

B, B, are the lire chambers, whichoccupy a space formed l.by ithe shell C, C, ofthe apparatus, whichsurrounds' `the meltingl pot '-A, A. Thervfuel may be putin Vthrough closely'1fittingdoor-ways, or Stoppers, D,"D.

It will be kseen in the sectional l drawing` that the "re chamber consists `oftwo parts;` an

upper, B ,f and a lower,`B, which are generall-y connected frtogetherlby theflue space B,

fromthe'upper chamber,-proceeds a smoke pipe E butfthese two chambers-may be separa-tedfrom` each other lby'V a-rpartition at a, a,fand anf--additionalsmoke pipe passup from 4the flue'spacel B, lof' the *lower comrangements, I am enabled to command and regulate the heat, both in the part where the melting is to be effected, and inthat whence it is to flow into the forming tube, G, into which the metal flows from the melting pot.

H, is the core which occupies the center of the forming tube G; this core is made slightly conical, to allow for the shrinkage of the metal as it cools around it; at its rear end there isa conical frustum I, which is ground so as to fit into a block of metal b, connected with the forming tube H; and this conical part may be kept in place by a back-center, as at J. A part of the shaft of t-he core projects through the back of the lower fire chamber, as shown at K, and has attached to it a vibrating rod L, the Vlower end of which is moved back and forth by an eccentric, or crank motion, so as to rotate the crank backward and forward, to a short distance; this IV effect by means of a shaft, which serves,` also, to turn two delivering rollers that embrace the pipe as it leaves the forming tube.

In the perspective View, Fig. l, M, M', are two toothed wheels which carry the delivering rollers N, N, on their axes.; these rollers are hollowed, or fluted, on their peripheries, so as to adapt them to the pipe which is to pass between them. The uppermost of these rollers may be weighted toV any requisite amount. Such delivering rollers have been previously used in some analogous machines.

O, is a winch that turns a shaft having on it an endless screw that takes into the toothed wheel M, and upon this shaft is the eccentric, or other similar device that vibrates the rod, and, consequently, the core H. The delivery tube, G, I surround at its outer end by a hollow nozzle, P, through which cold water is to be made to pass durf.

ing the casting of the pipe; there may be two, or more, such no-zzles for larger pipe, should this be found useful. The shaft which turns the delivering rollers, and also vibrates the piston, is shown in red lines in F ig. 2, but not exactly in place, as it does not occupy a place under the center of the machine.

Having thus, fully described the manner in which I, in general, construct and arrange the respective parts of my apparatus, I will here observe that the melting pot, and the re chambers, may be differently formed, and managed, while my main improvement, that of vibrating the core, may still be retained; these two part-s being' in their nature distinct from each other; but having essayed various modes of constructing and arranging the melting pot, and of combining it with the fire chambers, I have found that which I have herein described the most convenient. and eifective. I therefore claim as my invention,- and desire toV secure by Letters-Patent l; The above described manner of constructing the furnace part of my apparatus in combination with the melting pot and the delivering tube; there being two fire chambers, the uppermost of Which serves, mainly, to fuse the metal in t-he melting pot, while the lowermost serves to regulate the heat of the metal as it flows into the tube Gr; the melting pot, also,` being formed and arranged substantially in the manner herein Y set forth, and represented inthe accompanying drawings.

2.. I also claim the manner of preventing the adhesion of the pipe to the core by causy ing said core to have a continuous, vibratory motion around its aXls, as herein made known; and this I claim irrespective of thev particular manner ofV constructing and arranging the other parts of the apparatus, as it may be used in anymachine in which the pipe is formed by the'flowing of the metal through 4a tube, furnished with a core, which is to determine the interior, Aor bore, of the pipe.

IVitnesses THos. P. JONES, JOHN Hlrz.

Y JOHN Larue; 

